Practical aspects regarding the evaluation of explosion protected equipment

Abstract

Based on the experience accumulated over time on the evaluation of equipment and installations in environments with potentially explosive atmospheres, this paper is intended to be an element of synthesis on issues related to the “in situ” assessment and solutions of solvency the deficiencies found. The assessment of these installations is very important in order to verify the implementation of measures that lead to minimizing the risk of ignition of explosive atmospheres. Evaluation of these installations is made through an on-site visit and on the basis of the technical documentation developed by the care of the user. In first part of the paper were presented the legal aspects regarding the placing on the market and the use of equipment designed for potentially explosive atmospheres. The paper is continuing with the presenting the technical aspects regarding the evaluation of equipment and installations operating in potentially explosive atmospheres followed by requirements for electrical equipment. The main conclusion, of the paper is that the explosion protection of the equipment intended for use in potentially explosive atmospheres may be invalidated by the incorrect selection of the equipment, incorrect installation of the product, inadequate: performance of inspection operations, maintenance or repairing of equipment.

General notions regarding ex repairs

“…Both the responsible persons and operators must be able to provide sufficient evidence that they are familiar with theory, that they have the necessary skills and understanding for work in which they are involved in connection with explosion-protected equipment. [9] Staff must attend regular training every three years on repair and overhaul aspects of Ex equipment. This means that 'Attested' units for repairs in the Ex field stay up to date with the practical aspects of repair and any changes to the standards.…”

Assessment and analysis of potentially explosive areas in distribution stations, generated by alternative fuels such as LPG, CNG and H2

“…The assessment of the explosion risk and the establishment of appropriate measures to reduce it to acceptable levels, in accordance with the rules and standards in force, are of particular importance for the safety, health of persons and property. The appearance of the types of protection was determined individually by critical situations, regarding the safety regime for operation of technical equipments in spaces with explosive atmosphere, but also by the forecast of some imminent technical advances [5].…”